Designation E1046 − 85 (Reapproved 2015) Standard Specification for Glass Westergren Tube, Disposable1 This standard is issued under the fixed designation E1046; the number immediately following the d[.]
Designation: E1046 − 85 (Reapproved 2015) Standard Specification for Glass Westergren Tube, Disposable1 This standard is issued under the fixed designation E1046; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision A number in parentheses indicates the year of last reapproval A superscript epsilon (´) indicates an editorial change since the last revision or reapproval Scope 4.1.2 Type II—self-zeroing tubes to be used with racks designed with convenient disposable tube features 1.1 This specification covers a disposable tube used for measuring the erythrocyte sedimentation rate, ESR (the suspension stability of red cells in diluted, anti-coagulated human blood) Materials 5.1 Glass—The tubes made to this specification shall be fabricated from borosilicate glass, Type I, Class B, or soda lime glass, Type II, in accordance with Specification E438 1.2 The values stated in SI units are to be regarded as standard No other units of measurement are included in this standard Physical Requirements 6.1 Design, Type I and II—The Westergren tube shall be made of one-piece construction from tubing that is straight and of uniform bore The ends of the tube shall be cut at right angles to the axis of the tube and fire polished 6.1.1 Type II only—Each tube shall have an absorbant cotton plug inserted in the tube with the bottom edge of the plug aligned with the mm calibration line The alignment of the plug to the calibration line should not vary by more than mL The plug must be capable of supporting a 200 mm vertical column of water when the plug has been thoroughly soaked Referenced Documents 2.1 ASTM Standards:2 E438 Specification for Glasses in Laboratory Apparatus Terminology 3.1 Definitions of Terms Specific to This Standard: 3.1.1 disposable, n—in accordance with this specification and the expected product performance expressed in this standard, those tubes which are to be used one time only Any institution or individual who resuses a disposable tube must bear full responsibility for its safety and effectiveness 3.1.2 Westergren3, n—surname of the individual responsible for the design of the reusable Westergren tube and the method of use for both reusable and disposable tubes NOTE 1—With possible printing scale variation and cotton plug alignment to the calibration line variation, the bottom of the cotton plug is to be located 200 mm from the bottom of the tube 6.2 Workmanship—The tube shall be free as possible from visible defects which would detract from its appearance or impair its serviceability when viewed by the human eye under normal room lighting Self-zeroing tubes are to be used with racks designed with convenient disposable tube features Classification 4.1 This specification covers a tube that is intended to be used one time only It is not to be confused with a reusable tube that is described in other published standards The tubes shall be of the following types: 4.1.1 Type I—standard Westergren tube to be used in conventional racks only, and 6.3 Dimensions—Dimensions and tolerances shall be in accordance with Fig The uniformity of the bore shall be 60.15 mm throughout the tube The tube shall have an inscribed graduated scale extending over the lower 200 1.0 mm of the tube The marker’s or vendor’s name or mark shall be inscribed on the tube in a selected location Inscription of the word “Westergren” on the tube is optional Type II tubes may be made of varied lengths from 230 to 243 mm long with the selected length within this range confined to a 61 mm tolerance This specification is under the jurisdiction of ASTM Committee E41 on Laboratory Apparatus and is the direct responsibility of Subcommittee E41.01 on Laboratory Ware and Supplies Current edition approved June 1, 2015 Published July 2015 Originally approved in 1985 Last previous edition approved in 2010 as E1046 – 85 (2010) DOI: 10.1520/E1046-85R15 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website Westergren, A., “Studies of the Suspension Stability of the Blood in Pilmonary Tuberculosis,” Acta Medica Scandinavia, 54, 1920–1921, pp 247–282 6.4 Graduation Lines—Thickness of graduation lines may vary in uniformity but shall not exceed 0.4 mm in thickness They shall lie at right angles to the axis of the tube with a maximum tolerance between two adjacent markings of 0.25 mm Maximum tolerance for the total 200 mm scale shall not exceed 1.0 mm Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959 United States E1046 − 85 (2015) FIG 6.5 Graduation Line Numbering—The tube shall be graduated in millimetres with a scale of 200 mm from the tip of the tube The tube shall be numbered every 10 or 20 graduation lines starting with a numerical zero (0) and downward to a maximum value of 180 or 190 mm The numerical markings shall appear at the right side of the graduated scale when held vertically with the scale facing the viewer Keywords 7.1 disposable; glass; tube ; Westergren ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above address or at 610-832-9585 (phone), 610-832-9555 (fax), or service@astm.org (e-mail); or through the ASTM website (www.astm.org) Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http://www.copyright.com/